import { dateUtil } from "/@/utils/dateUtil"
import { reactive, toRefs } from "vue"
import { tryOnMounted, tryOnUnmounted } from "@vueuse/core"

export function useNow(immediate = true) {
  let timer: IntervalHandle

  const state = reactive({
    year: 0,
    month: 0,
    week: "",
    day: 0,
    hour: "",
    minute: "",
    second: 0,
    meridiem: "",
  })

  const update = () => {
    const now = dateUtil()

    const h = now.format("HH")
    const m = now.format("mm")
    const s = now.get("s")

    state.year = now.get("y")
    state.month = now.get("M") + 1
    state.week = "星期" + ["日", "一", "二", "三", "四", "五", "六"][now.day()]
    state.day = now.get("date")
    state.hour = h
    state.minute = m
    state.second = s

    state.meridiem = now.format("A")
  }

  function start() {
    update()
    clearInterval(timer)
    timer = setInterval(() => update(), 1000)
  }

  function stop() {
    clearInterval(timer)
  }

  tryOnMounted(() => {
    immediate && start()
  })

  tryOnUnmounted(() => {
    stop()
  })

  return {
    ...toRefs(state),
    start,
    stop,
  }
}
